Chuck



which illustrate ywhat at present vdeemedv to be a preferred embodiment oftheinven `Patented Jan.2o, 193"1 f theworkfonaliveupon stationaryisupport. ,5.r i' An'object lof morequicklyan'dfeasily vopera`t; le 1nean s ,for gripping 'and releasing' vthe k work 'mounted v upon thefchuck. 'U

` Another' olojeczt 'of "thef'inyention 'is,`fingeneral, toi V'simplify andfstabilize 'the conf struction ofa chuck, Q v'Stillpther ob'jeot's`- of the invention v are/co provide a chuck which is self-contained, one which "requiresfno special vtoolsf'forv its'ope'rar siredv elfde'v which hav'e been mentione'dmay, nevertheless,- be manufactured at alow oo st.v

Other objects and advantages may-hereinafter appear. f

Referring to the accompanying drawings,

tion, n D l Y' Fig.'1 is a backview ofthe device.-

Fig. "2' is across section `on vangulariline base of-'its-taper withan external fiange or`- shoulder 6. The' flanged end lof said vhead 5 is attached to an annular back plate7 by means of screws 8'. The lathe head '1 0 is in-` dic'at'ed in dotted lines. r

Said chuck kheadv-has therethrough an axial bore 11 which is provided with an enlarged back portion 12, thus forming an tions ll'and 12. v

yvidediwith av plurality `(inthepresent instance two diametrically opposite) of cut an idlergear wheel 17 having ya front trunnion `18 and a back trunnion' 19, saidtrunnions rotating in seatsprovided for' them so Fig. 2.

Spindle@ @minieme the inventionisito throughout' 4its vfront portion, being .th ere f cause-)the internal diaineterlof saidsleeveftof DO'SSblYtofbrng the SC, annular shoulder 13 between "said .bore por-` `tionv between the internalpartfO-of lca'nyin`g-"n iernber Q ()"and the gear,

,nearergto thecnter of the chuck, 'f thusfob-i tainingagreater leverageWhere' the screw threadedffinection is SmadeQThefscrew threaded* connection isf Vadaptedf- The back end of chuck head 5`is ,furnished with a broadannularrise lgwhich is pro- :v

away portions 16 in'y each O f Which slocated' in the head 5 and back-plate Tasshown inf j The tubular jaw member 20- is madegof Q resilient metal. and hasa, plurality o 'f--deep f1" slotsQl cutinto .its fronti end,` therebygfsegrel y gatin'gfromfeaeh `otherlthev jaw elements 22, f

Shaped' in such a mannergasfto provideanv @Xt/Griery inclined face 23.6 When the` jaw is 5 screw inm'the irn-t' end of the; chuck head @121 5.H The bore 11v of theheadis enlargedat eXternally'fshaped asj1a hand wheel, b

partY 31 vextend completely i aroun d plate 7, andscrew threaded holes 42 are rovided to receive cap screws 43, one of w ich is shown in dotted lines inl Fig. 2. r

Claims:` t

1. In a chuck, ay jaw member comprising a' slidable, non-rotatabler sleeve of* resilient material,fsaid-sleeve having slits opening out at one end thereof,the spaces between said e slits constituting jaw elements, said sleeve' supporting meansto impart 4to thema closling movement whenv the aforementioned t for said ,.sli'dable jaws,

sleeve is retracted. n

t 2. In a chuck, a plurality of vcot-operating slidable ripping jaws arranged concentrically with res ectto the axis of rotation of the chuck, sai jaws being provided with exev terior surfaces which are inclined axially of the chuck, a common nonrotatable support` said supportll'iaving f an externally screw threaded portion, a rotatable .annular gear wheel' havin internal screw lthreadsengaging the screwt reads of said'jaw support, a hand `wheel having internalgear teeth in radiall lspaced relation to'said annulall gear, a plura ity of idler gears Eositioned between thel ar teeth of said and wheel and of, sai t annular gear to transmit rotation from'the former tothe latand having an internal face to engage the aforementioned inclined jaw surfaces to impart a closin movement to said jaws whenv said yhand wleel is rotated in one direction 'aws to open when said and ermitting said vin the other direction,

han wheel is rotate the aforementioned common support for said jaws being` resilient and to se arnte said jaws.

4,1 n'a-chuck, aplurality of cooperating jaws arranged around the laxis of the chuck,`

non-rotatable slidable for said jaws,

having resilient said jaws from each other, said jaw supporting means bein provided ,with external threads, a rotata le annular gear havin inf terna'l threads `which 'engage the' threads yof jaw supporting means said jaw supporting means said jaw su porting means to extend and reytract 1t,d1d er gears engaging said annular gear externally, a' hand wheel of said idler gears, and means to 'support the continually tending elements tending to separate t as ving internal gear teeth in engagement with the gear teeth e aforementioned-*parts in an operative relat tion to eachA other, said'jaws being provided with inclinedv portions operatively related to said supportingmeansto impart to them a closing movement when thea'forementioned jaw'supporting means is retracted.v 4

'In testimony whereof 'I hereby aix my signature. e n

i KN UT R-aS-JOGRmIl ter, Yand means to engage vthe aforementioned 'l inclined jawfsurf'aces v`to impart a vclosin vmovement to said jawswhen said hand whee l is rotated' in vonedirection and permitting saidjawsjto open when said hand wheel is rotatedin th'erother direction, the aforemen-` tionedfcommon ksupport for said jaws being j 'resilient' and continually tending to separate said `aws.

3. n" achuck, a plurality of (zo-operating slidable 'gl-rippingl jaws arranged concentrically wit lres ect to the axis of rotation of vthe chuck, sai jaws being provided with exterior "surfaces kwhich are inclined axially of thechuck, a non-rotatable support for said slidable jaws, said ysu port havmg an externally screw threade portion,a rotatable annular gear wheel/having internal screw Jaw Sup Ort, a gear vteet n `threadsengagingV the screw ythreads of said nd wheel having internal ,in radially spaced relationtosaid annualgeaga plurality of idler gearspositioned betweenthe gear t eeth of said hand -fwheel and of, said, annular gear to'transmit f i n rotation fromthe former tothe latten, and a v bushing mounted axially within the chuckn' lso 

